#!/usr/bin/env node
const http =require('http'),
       url=require('url'),
      qs=require('querystring');
      //log=console.log;
let items=[];
function genPage(){
    let dom=(items.length===0)? '' : items.map(i=>'<li>'+i+'</li>').join('\n');
  let html=`
<!DOCTYPE html>
<html lang="en">
<head>
     <meta charset="UTF-8">
    <title>ToDolist</title>
</head>
<body>
     <h1>Todo List</h1>
     <form action="http://192.168.118.144:8080/" method="GET">
    <input type="text " name="item">
    <input type="submit" value="提交">
  </form>
  <ul id="items">
    ${dom}
  </ul>
</body>
</html>
`;
  return html;
}
http.createServer((req,res)=>{
  let addr=url.parse(req.url);
   if(addr.pathname!=='/'){
       res.statusCode=404;
       res.setHeader('Content-Type','text/html');
    res.end('<h1>not found</h1>');
    return ;
  }
  let item= qs.parse(addr.query).item;
  if(item!=='' &&  typeof item !=='undefined' )items.push(item);


  res.writeHead(200,{
    'Content-Type':'text/html',
    'Content-Length':Buffer.byteLength(genPage())
  });
  res.end(genPage());
}).listen(8080);









